Grate



Feb. 4, 1930. K; MOORE 1,746,126

GRATE 7 Filed NOV. 28, 1927 INVENTOR MK. More,

4 I w -Z BY JLWMj ATTORNEY Patented Feb. 4, 1930 MORTON MOORE, orCHARLESTON, sou'rr-r CAROLINA GRATE Application filed November 28, 1927.Serial No, 236,219.-

My invention relates to grates, and more particularly to improvements inthe grate bar disclosed in the co-pending application of Henry K.'Milner, for grate, filed June 14, 1926, Serial No. 115,928, and whichapplication was assigned to me August 24, 1927 An object of the presentinvention is to generally improve the interchangeable grate elementsdisclosed in the above identified application.

The invention further provides a grate elementor unit which is soconstructed as to prevent the accumulation of hot coals and theresultant burning out of the grate elements or units.

Further the invention contemplates a grate element wherein a maximumnatural draught will be conducted thereto, and thus keep the grateelement in a maximum cool state. 1

With the preceeding and other objects and advantages in mind, theinvention consists in the combination of elements, construction,arrangement of parts and operations to be hereinafter specificallyreferred to, claimed and illustrated in the accompanying drawings,wherein: I

Figure 1 is a fragmentary horizontal sectional view of a fire box havingmade up from my improved replaceable grate element or unit;

Figure 2 is a front elevation of my im: proved grate element received inits supporting bar, the supporting bar being shown in vertical crosssection;

Figure 3 is a vertical sectional view taken on line 3-3 of Figure 2;

Figure 4 is a horizontal section on line 4-4: of Figure 2; V

Figure 5 is a side elevation of a modified embodiment of the invention.

Figure 6 1s a vertical section taken on line 6-6 of Figure 5; and

Figure 7 is a fragmentary perspective of the supporting bar embodied inthe inven tion.

Referring to the invention in detail, a hollow rectangular supportingbar 5 having vertical rectangular cells or sockets 6 is provided.

My improved grate element or unit comgrate bars prises a longitudinally.curved segment 3 cast with lateral enlargements 10 substantially'triangular in vertical cross section. These enlargements 10 are ofgreater width than the transverse width" of the segments andare formedwith a V-shaped seat 11 at one end, and a V-shaped tongue 12 at itsopposite end which interfits in the V-shaped'sea't 11 in the enlargementof the adjacent element. As illustrated in Figure 1', the seats 11 andtongues 12, of the enlargements of each grate element or unit aredisposed reversely so that all of the grate elements interfit and retainthe grate in assembled relation to afford a fire bed or grate surfacel'Due to the arrangement of the seats and tongues, the grate elements orsections can only be assembled in mating relation. In order that thegrate bars may be rocked to dump or clear the same, the

opposite ends ofthe enlargements 10 are beveled as indicated at 9.Formed integrally with the segment 3 and arranged directly below theslots or ventilatingopenings 13therein is a pair of oppositely arrangedcurved arms 14 whose outer ends merge into the underface of theenlargements and ends ofthe segment. These arms'have their upper edges15 beveled to cause dropping coals or thereby prevent accumulationof hotcoals or ashes which ordinarily would burn out or destroy thegrate'element. I

A central vertical brace 16 integrally con: nects the under face of thesegment and the arms 14 which, in addition to reinforcing the grateelement, alsoserves to support the segment in the event that the latterbecomes cracked or broken at one ,or both sides of the brace. V J g Avertically disposed shank 17 rectangular in cross section is connectedwith the arms 14k in vertical alinement with the brace 16, andis adaptedto be received in one of the rectangularsockets or cells 6 in thesupporting member 5. Withtheshank thus positioned the segment 3 extendstransversely of the member 5 above the latter. Vertical grooves 18extendithe' entire length of the opposed faces of the shank, andconstitute 'air'fpassages which' communicate. at their ashes to falltherefrom, and

upper end with lateral outlet openings 19 to supply air currents to thearms 14 and adjacent parts for cooling purposes.

This construction produces a clear airway to the grate elements andfuel, thereby giving a maximum life to the grate elements and causesmore perfect combustion of the fuel. 7

To prevent accumulation of burning coals or ashes between adjacent grateelements, inverted V-shaped shields or deflectors 20 are disposed uponopposite sides of the arms and brace 16 directly above the air passageways. These shields, or deflectors project laterally and are positionedwith their apexes disposed at the vertical center of the brace 16 andtheir ends pr,ojecting beyond the openings 19. As illustrated in Figure1, the shields or deflectors of the adjacent grate elements abut toentirely close the space between the grate elements above the member 5.It will be observed that any coals or ashes dropping between the grateelements will be deflected laterally beyond the opposite vertical facesof the member 5 so that they will fall directly into the ash pit below.In this connection, it will be observed that the lower edges of theshields or deflectors extend slightly beyond the member 5.

In Figures 5 and 6, I have illustrated my improvement with a modifiedform of grate element. In this instance a flat bar 21 is formed at theupper end of a vertically extending web 22 from which the shank 17 0extends.

In this instance the deflectors or shields 20 are cast on the oppositefaces of the web directly. above the shank. The bar 21-is of greatercross sectional area than the web, and the under face of the bar isbevelled upon opposite sides of the web as at 23 to direct air currentsalong the bar to prevent burning out of the latter. To further aid in athe cooling of the grate element, the web is provided with ventilatingopenings 24;. If desirable the bevels 23 may be substituted by squarecorners.

What is claimed is:

In a grate element, a fuel supporting member, a shank extending from theunder side of the fuel supporting member and located centrally of theextremities of the latter, an

inverted V-shaped member projecting laterally from one face of the fuelsupporting member above the shank and having its ends projectingdownwardly beyond 7 opposite sides of the shank, the shank having alongitudinally extending air passage throughout its entire length andlaterally extending air passages at its upper end which open'on 0ppositefaces of the shank at points adjacent the lower ends of the invertedV-shaped member Signed at city of Washington in the District ofColumbia, this fourth day of November, 1927.

MORTON -K. MOORE;

